Reaxis®  C221

REAXIS® C221 is a versatile organotin catalyst that can be used in various silicone and polyurethane applications. Additional applications of REAXIS® C221 include:

  • Catalysis of urethanes where low color is required
  • Esterification and transesterification reactions
  • Silicone condensations (e.g. RTV resins)
  • Silane modified polyethylenes.

Custom formulations of REAXIS® C221 are available upon request.

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Reaxis® C221 - Product Details


  • Tin Content (%) 19.5 - 22.0
  • Color (Gardner Number) 5 Max
  • Density (g/ml) 1.0 - 1.1

Standard Packaging

  • 44 lb (20 kg) plastic drums
  • 485 lb (220 kg) drums


  • Physical state  liquid
  • Chemical type  dibutyltin
  • Viscosity (cP@20°C)  180 - 220

Storage Conditions

REAXIS® 221 should be stored in the original packaging at moderate temperatures and kept from freezing. The container should be closed tightly after each use to maximize shelf life.

This information is provided to the best of our knowledge but without obligation. Reaxis is not liable for any incorrect or missing information. This data sheet becomes invalid upon publication of a new version. Please contact us for the latest version.

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